An infrared transient from a star engulfing a planet
© 2023. The Author(s), under exclusive licence to Springer Nature Limited..
Planets with short orbital periods (roughly under 10 days) are common around stars like the Sun1,2. Stars expand as they evolve and thus we expect their close planetary companions to be engulfed, possibly powering luminous mass ejections from the host star3-5. However, this phase has never been directly observed. Here we report observations of ZTF SLRN-2020, a short-lived optical outburst in the Galactic disk accompanied by bright and long-lived infrared emission. The resulting light curve and spectra share striking similarities with those of red novae6,7-a class of eruptions now confirmed8 to arise from mergers of binary stars. Its exceptionally low optical luminosity (approximately 1035 erg s-1) and radiated energy (approximately 6.5 × 1041 erg) point to the engulfment of a planet of fewer than roughly ten Jupiter masses by its Sun-like host star. We estimate the Galactic rate of such subluminous red novae to be roughly between 0.1 and several per year. Future Galactic plane surveys should routinely identify these, showing the demographics of planetary engulfment and the ultimate fate of planets in the inner Solar System.
| Errataetall: |
CommentIn: Nature. 2023 May;617(7959):38-39. - PMID 37138112 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:617 |
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| Enthalten in: |
Nature - 617(2023), 7959 vom: 07. Mai, Seite 55-60 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
De, Kishalay [VerfasserIn] |
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| Links: |
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Journal Article |
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| Anmerkungen: |
Date Completed 06.05.2023 Date Revised 08.12.2023 published: Print-Electronic CommentIn: Nature. 2023 May;617(7959):38-39. - PMID 37138112 Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1038/s41586-023-05842-x |
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| 100 | 1 | |a De, Kishalay |e verfasserin |4 aut | |
| 245 | 1 | 3 | |a An infrared transient from a star engulfing a planet |
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| 500 | |a CommentIn: Nature. 2023 May;617(7959):38-39. - PMID 37138112 | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a © 2023. The Author(s), under exclusive licence to Springer Nature Limited. | ||
| 520 | |a Planets with short orbital periods (roughly under 10 days) are common around stars like the Sun1,2. Stars expand as they evolve and thus we expect their close planetary companions to be engulfed, possibly powering luminous mass ejections from the host star3-5. However, this phase has never been directly observed. Here we report observations of ZTF SLRN-2020, a short-lived optical outburst in the Galactic disk accompanied by bright and long-lived infrared emission. The resulting light curve and spectra share striking similarities with those of red novae6,7-a class of eruptions now confirmed8 to arise from mergers of binary stars. Its exceptionally low optical luminosity (approximately 1035 erg s-1) and radiated energy (approximately 6.5 × 1041 erg) point to the engulfment of a planet of fewer than roughly ten Jupiter masses by its Sun-like host star. We estimate the Galactic rate of such subluminous red novae to be roughly between 0.1 and several per year. Future Galactic plane surveys should routinely identify these, showing the demographics of planetary engulfment and the ultimate fate of planets in the inner Solar System | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
| 700 | 1 | |a MacLeod, Morgan |e verfasserin |4 aut | |
| 700 | 1 | |a Karambelkar, Viraj |e verfasserin |4 aut | |
| 700 | 1 | |a Jencson, Jacob E |e verfasserin |4 aut | |
| 700 | 1 | |a Chakrabarty, Deepto |e verfasserin |4 aut | |
| 700 | 1 | |a Conroy, Charlie |e verfasserin |4 aut | |
| 700 | 1 | |a Dekany, Richard |e verfasserin |4 aut | |
| 700 | 1 | |a Eilers, Anna-Christina |e verfasserin |4 aut | |
| 700 | 1 | |a Graham, Matthew J |e verfasserin |4 aut | |
| 700 | 1 | |a Hillenbrand, Lynne A |e verfasserin |4 aut | |
| 700 | 1 | |a Kara, Erin |e verfasserin |4 aut | |
| 700 | 1 | |a Kasliwal, Mansi M |e verfasserin |4 aut | |
| 700 | 1 | |a Kulkarni, S R |e verfasserin |4 aut | |
| 700 | 1 | |a Lau, Ryan M |e verfasserin |4 aut | |
| 700 | 1 | |a Loeb, Abraham |e verfasserin |4 aut | |
| 700 | 1 | |a Masci, Frank |e verfasserin |4 aut | |
| 700 | 1 | |a Medford, Michael S |e verfasserin |4 aut | |
| 700 | 1 | |a Meisner, Aaron M |e verfasserin |4 aut | |
| 700 | 1 | |a Patel, Nimesh |e verfasserin |4 aut | |
| 700 | 1 | |a Quiroga-Nuñez, Luis Henry |e verfasserin |4 aut | |
| 700 | 1 | |a Riddle, Reed L |e verfasserin |4 aut | |
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| 700 | 1 | |a Vanderburg, Andrew |e verfasserin |4 aut | |
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